Voigtlander 23mm f/1.2 APS-C and 35mm f/1.4 Full Frame Patents Found
Sigma 50-140mm F/2.8 DC DN and Sigma 70-200mm f/2.8 DG DN Patents Found
Fujinon GF17-35mm f/4, GF17-30mm f/4, and GF17-35mm f/4-5.6 Patents Found
The latest patents from Fujifilm, Voigtlander, Tamron, and Sigma
